MAX6683 19-2226 Rev 1 7/04 Temperature Sensor and System Monitor in a 10-Pin MAX General Description Features The MAX6683 system supervisor monitors multiple Monitors Local Temperature power-supply voltages, including its own, and also fea- Monitors Three External Voltages (1.8V, 2.5V, 5V tures an on-board temperature sensor. The MAX6683 Nominal) converts voltages to an 8-bit code and temperatures to an 11-bit (10-bit-plus-sign) code using an analog-to- Monitors V (3.3V Nominal) CC digital converter (ADC). A multiplexer automatically User-Programmable Voltage and Temperature sequences through the voltage and temperature mea- surements. The digitized signals are then stored in reg- Thresholds isters and compared to the over/underthreshold limits Alert Function with Ability to Respond to SMB 2 programmed over the SMBus/I C-compatible 2- Alert Response Address wire serial interface. +2.7V to +5.5V Supply Range When a temperature measurement exceeds the pro- grammed threshold, or when an input voltage falls out- -40C to +125C Temperature Range side the programmed voltage limits, the MAX6683 60Hz or 50Hz Line-Frequency Rejection generates a latched interrupt output ALERT. Three interrupt modes are available for temperature excur- Tiny 10-Pin MAX Package sions. These are default mode, one-time interrupt MAX6683EVKIT Available mode, and comparator mode. The ALERT output is cleared, except for temperature interrupts generated in comparator mode, by reading the Interrupt Status reg- ister (Table 5). The ALERT output can also be masked by writing to the appropriate bits in the Interrupt Mask register (Table 6) or by setting bit 1 of the Configuration 2 register (Table 4) to zero. The MAX6683 SMBus/I C- Ordering Information compatible interface also responds to the SMB alert PART TEMP RANGE PIN-PACKAGE response address. MAX6683AUB -40C to +125C 10 MAX Applications Workstations Servers Networking Telecommunications Typical Application Circuit Pin Configuration 1.8V TOP VIEW V = +3.3V CC CPU 1.8V 1 10 V 0.1F IN CC 2.5V 2 9 SCL IN MAX6683 10k 5V 3 8 SDA IN TO 1.8V 1.8V IN V CC N.C. 4 7 ADD 2 I C/SMBus 2.5V SCL TO 2.5V IN CONTROLLER 5V SDA TO 5V IN GND 5 6 ALERT ADD N.C. ALERT GND SMBus is a trademark of Intel Corp. 2 I C is a trademark of Philips Corp. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLETemperature Sensor and System Monitor in a 10-Pin MAX ABSOLUTE MAXIMUM RATINGS All Voltages Referenced to GND Junction Temperature......................................................+150C All Pins...................................................................-0.3V to +6.0V Operating Temperature Range .........................-40C to +125C SDA, ALERT Current...........................................-1mA to +50mA Storage Temperature Range .............................-65C to +150C Continuous Power Dissipation (T = +70C) Lead Temperature (soldering, 10s) .................................+300C A 10-Pin MAX (derate 5.6mW/C above +70C) ...........444mW Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (T = -40C to +125C, unless otherwise noted. Typical values are at V = +3.3V, T = +25C.) A CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS POWER SUPPLY Supply Voltage V 2.7 5.5 V CC I Operating 200 500 CC Supply Current A I Shutdown mode, interface inactive 10 SD Power-On Reset (POR) Voltage V , rising or falling edge 2 V CC TEMPERATURE T = +25C, V = +3.3V 3 A CC Accuracy 0C T +125C, V = +3.3V 4 C A CC -40C T +125C, V = +3.3V 6 A CC Resolution Read word mode 0.125 C 1.5 Supply Sensitivity PSS 0.7 C/V ADC CHARACTERISTICS Total Unadjusted Error TUE V > 10LSBs 1.5 % IN Differential Nonlinearity DNL V > 10LSBs 1 LSB IN Supply Sensitivity PSS 1 LSB/V Input Resistance R 1.8V , 2.5V , 5V 100 150 200 k IN IN IN IN Total Monitoring Cycle Time t (Note 1) 200 300 ms c SCL, SDA, ADD Logic Input Low Voltage V 0.8 V IL V 3.6V 2.0 CC Logic Input High Voltage V V IH V > 3.6V 2.6 CC Input Leakage Current I V = 0 or 5V 1A LEAK IN Output Low Voltage V I = 3mA 400 mV OL SINK ALERT I = 1.2mA, V > 2.7V 0.3 SINK CC Output Low Voltage V V OLA I = 3.2mA, V > 4.5V 0.4 SINK CC 2 MAX6683